controllers todo-list-edit.js

import Ember from 'ember';                                     
                                                               
export default Ember.Controller.extend({                       
    actions: {                                                 
        // ...                                                    
        saveTitle() {                                          
            this.get('model').save().then((list) => {          
                this.set('editingTitle', false);               
                this.transitionToRoute('todo-list-edit', list) 
            });                                                
        },                                                     
    }                                                          
});                                                            

router.js

import Ember from 'ember';                                            
import config from './config/environment';                            
                                                                      
var Router = Ember.Router.extend({                                    
  location: config.locationType                                       
});                                                                   
                                                                      
Router.map(function() {                                               
  this.resource('todo-lists', { path: '/todo' });                     
  this.resource('todo-list', { path: '/todo/:id/:title' });           
  this.resource('todo-list-edit', { path: '/todo/edit/:id/:title' }); 
});                                                                   
                                                                      
export default Router;                                                

routes todo-list-edit.js

import Ember from 'ember';                             
                                                       
export default Ember.Route.extend({                    
    model(params) {                                    
        return this.store.find('todo-list', params.id);
    }                                                  
});                                                    

templates todo-list-edit.hbs

{{#unless editingTitle}}                                            
  <h1 class='page-title' {{action "editTitle"}}>{{model.title}}</h1>
{{else}}                                                            
  {{input-autofocus                                                 
    value=model.title                                               
    autofocus="autofocus"                                           
    enter="saveTitle"                                               
    focus-out="saveTitle"                                           
  }}                                                                
{{/unless}}                                                         
                                                                    
{{#link-to 'todo-list' model}}                                      
  Back                                                              
{{/link-to}}                                                        
                                                                    
{{#each model.groups as |group|}}                                   
  {{todo-group-edit group=group action="createTodoItem"}}           
{{/each}}                                                           
<h2>                                                                
  {{input                                                           
    type="text"                                                     
    id="new-todo-group"                                             
    placeholder="Create a new group"                                
    value=newGroupTitle                                             
    enter="createTodoGroup"                                         
  }}                                                                
</h2>